Two New Recipes!!


    Aug 30 2007 | 12:10 am
    I hope you've got a big appetite....
    These sleepy summer days have afforded me some time to get back into the
    kitchen and whip up some more tasty treats for you guys.
    Recipe 39: Preview -- Pretty much what the name implies. Uses texture
    readback and shared_context to provide a nice OpenGL preview window.
    Recipe 40: SceneWarp -- Uses texture feedback and distortion to make
    some gloopy swirly effects. This recipe shows a nice advanced technique
    for texture feedback, and for managing render order with jit.gl.sketch
    objects and "layer" attributes.
    Don't forget your veggies...
    Happy Patching!
    Andrew Benson

    • Aug 31 2007 | 12:39 pm
      Resipe 40, SceneWarp look great the first time when I tried it on a mac. On
      a windows pc I changed the jit.qt.grab to jit.dx.grab for a working result,
      jit.qt.grab gives me my windows some distorted vertical lines. But is there
      something with the lumagate shader differ on mac and windows? On the mac the
      luma works fine but my windows machine gives no luma-key-like-effect that
      was meant. The luma range works for filtering light/dark but no luma key.
      hmm, I must get a bit more into these shaders... or is it something else.
      I used the uyvy colormode in the jit.dx.grab btw.
      cheers,
      ra.
      2007/8/30, andrew benson :
      >
      > I hope you've got a big appetite....
      >
      > These sleepy summer days have afforded me some time to get back into the
      > kitchen and whip up some more tasty treats for you guys.
      >
      > http://www.cycling74.com/story/2006/2/17/153427/406
      >
      > Recipe 39: Preview -- Pretty much what the name implies. Uses texture
      > readback and shared_context to provide a nice OpenGL preview window.
      >
      > Recipe 40: SceneWarp -- Uses texture feedback and distortion to make
      > some gloopy swirly effects. This recipe shows a nice advanced technique
      > for texture feedback, and for managing render order with jit.gl.sketch
      > objects and "layer" attributes.
      >
      > Don't forget your veggies...
      >
      > Happy Patching!
      > Andrew Benson
      >
    • Aug 31 2007 | 2:59 pm
      Hi Ranja,
      Are you seeing any error messages in the Max window?
      What type of graphics card are you using on your Windows box? Do other
      C74 shaders work on this machine?
      When you say that the "range works for filtering light and dark", what
      exactly do you mean? Have you set a fade amount? Please tell me what
      you are seeing exactly so that I can better tell what is creating
      trouble for you.
      Best,
      Andrew B.
    • Sep 18 2007 | 3:03 pm
      Hi Andrew,
      I saw my reply didn't make it to the forum while I send more than one
      attachments. So once again.
      I'm running in Vista 64 bit on a intel core 2 duo, nvidia GeForce 7900 GTX
      graphic card, max 4.6.3 / jitter 1.6.3.
      There are no errors in the max window and other c74 shaders are working on
      this machine. The lumagate shader is working when I change the luma range
      and fade variables. I can change the threshold of light and dark. Only on
      the pc there is no feedback like there is on the mac.
      Some examples can be found here
      In the first place I turned off /bypassed the mesh distortion to see what
      happens [see here]and
      when I turned on the mesh distortion you get this
      result.
      Maybe that is the intention because it looks like the example image on the
      c74 jitter recipes site.
      But when using on the mac (G5, PowerPc), the thresholded luma part is
      feedbacked [see
      picture]
      (dark area is feedbacked and warped).
      When you say that the "range works for filtering light and dark", what
      > exactly do you mean?
      >
      By "range.." i meant the threshold of the lumagate/lumakey or the lum param.
      thanks,
      ra.
      2007/8/31, Andrew Benson < andrewb@cycling74.com>:
      > >
      > > Hi Ranja,
      > > Are you seeing any error messages in the Max window?
      > >
      > > What type of graphics card are you using on your Windows box? Do other
      > > C74 shaders work on this machine?
      > >
      > > When you say that the "range works for filtering light and dark", what
      > > exactly do you mean? Have you set a fade amount? Please tell me what
      > > you are seeing exactly so that I can better tell what is creating
      > > trouble for you.
      > >
      > > Best,
      > > Andrew B.
      > >
      >
      >
      >
    • Sep 19 2007 | 12:47 am
      Hi Andrew,
      I am a Jitter beginner/ I have been playing around with, your Video Synth patch and was wondering if it was possible to attach that patch to a live video feed?
      I need help!
      Thanks!
    • Sep 19 2007 | 1:16 am
      Well, yes it is possible, of course.
      The thing you will need to ask yourself is in what way you want to use
      the live video feed. Are you compositing the video-synthesis drawing
      stuff with a live feed, or are you trying to distort the live feed the
      way that the drawing is getting distorted? I would recommend looking at
      the jitter tutorials and the other recipes for ideas about how this
      might be worked out.
      Everything between jit.qt.grab and jit.window is your choice to be made...
      Happy Patching!
      Andrew B.
      myspacegrab wrote:
      > Hi Andrew,
      >
      > I am a Jitter beginner/ I have been playing around with, your Video Synth patch and was wondering if it was possible to attach that patch to a live video feed?
      >
      > I need help!
      >
      > Thanks!
      >
    • Sep 19 2007 | 1:33 am
      Hi Andrew,
      Thanks for the response. I am trying to distort the live feed the
      way that the drawing is getting distorted. I guess the question I asking is there anyway I could just connect a live video feed patch to your exsisting patch? Or not so simple?
    • Sep 19 2007 | 1:43 am
      replace jit.qt.movie, or whatever is the source of the texture with
      jit.qt.grab.
      On Sep 18, 2007, at 9:33 PM, myspacegrab wrote:
      >
      > Hi Andrew,
      >
      > Thanks for the response. I am trying to distort the live feed the
      > way that the drawing is getting distorted. I guess the question I
      > asking is there anyway I could just connect a live video feed patch
      > to your exsisting patch? Or not so simple?
      v a d e //
      www.vade.info
      abstrakt.vade.info
    • Sep 19 2007 | 2:00 am
      Thanks Vade,
      I had a look for any jit.qt objects but couldnt find any, heres a screenshot of the patch.
      Any other ideas?
    • Sep 19 2007 | 2:12 am
      look inside the [p video] sub patch.
      and go through the max/jitter tutorials.
      On 9/18/07, myspacegrab wrote:
      >
      > Thanks Vade,
      >
      > I had a look for any jit.qt objects but couldnt find any, heres a screenshot of the patch.
      >
      > http://img227.imageshack.us/img227/4990/maxmspscreensnapz002tw9.jpg
      >
      > Any other ideas?
      >
    • Sep 19 2007 | 2:13 am
      p video subpatch?
      On Sep 18, 2007, at 10:00 PM, myspacegrab wrote:
      >
      > Thanks Vade,
      >
      > I had a look for any jit.qt objects but couldnt find any, heres a
      > screenshot of the patch.
      >
      > http://img227.imageshack.us/img227/4990/maxmspscreensnapz002tw9.jpg
      >
      > Any other ideas?
      v a d e //
      www.vade.info
      abstrakt.vade.info
    • Sep 19 2007 | 9:03 pm
      I tried mucking around with the "p video" subpatch and tried adding my video feed patch, but nothing seemed to work, I added a screenshot below. Ah Crazy!